3 Advices of Rasulullah (Sallallahu alayhi wasallam)

وَعَنْ أَبِي أَيُّوبَ الْأَنْصَارِيِّ رَضِيَ اللهُ عَنْهُ قَالَ: جَاءَ رَجل إِلَى النَّبِيِّ صَلَّى الله عَلَيْهِ وَسَلَّمَ فَقَالَ: عِظنِي وَأَوْجِز. فَقَالَ: «إِذَا قُمْتَ فِي صَلَاتِكَ فَصَلِّ صَلَاةَ مُوَدَعٍ وَلَا تَكَلَّمُ بِكَلَامٍ تَعْذِرُ مِنْهُ غَدًا وَأَجْمَعِ الْإِيَاسَ مِمَّا فِي أَيْدِي النَّاسِ»

It is narrated by Abu Ayyub Ansari that a man came to Rasulullah  (Sallallahu alayhi wasallam) and said, "Give me good advice but be brief." Rasulullah said: "When you get up to offer salah, perform salah as if you are going to depart from this world: do not speak anything for which you may be sorry tomorrow and which you may have to explain; and adopt complete in-difference to what is in the hands of other people. (Ahmad)